65564500 has 24 divisors (see below), whose sum is σ = 143193960. Its totient is φ = 26225600.

The previous prime is 65564491. The next prime is 65564507. The reversal of 65564500 is 546556.

It can be written as a sum of positive squares in 4 ways, for example, as 213444 + 65351056 = 462^2 + 8084^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65564507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65065 + ... + 66064.

It is an arithmetic number, because the mean of its divisors is an integer number (5966415).

Almost surely, 2^65564500 is an apocalyptic number.

It is an amenable number.

65564500 is an abundant number, since it is smaller than the sum of its proper divisors (77629460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65564500 is a wasteful number, since it uses less digits than its factorization.

65564500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131148 (or 131136 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 65564500 is about 8097.1908709132. The cubic root of 65564500 is about 403.2331710999.

The spelling of 65564500 in words is "sixty-five million, five hundred sixty-four thousand, five hundred".